NEW YORK, NY - SEPTEMBER 15: Actors Bella Thorne and Gregg Sulkin attend Diesel Black Gold Spring show during 2016 New York Fashion Week on September 15, 2015 in New York City. (Photo by Joe Kohen/Getty Images)

NEW YORK, NY - SEPTEMBER 15: Nina Agdal, Gregg Sulkin and Bella Thorne attend Diesel Black Gold Spring show during 2016 New York Fashion Week on September 15, 2015 in New York City. (Photo by Jenny Anderson/WireImage)

NEW YORK, NY - SEPTEMBER 16: Bella Thorne and Gregg Sulkin attend the Marchesa fashion show during Spring 2016 New York Fashion Week at St. Regis Hotel on September 16, 2015 in New York City. (Photo by Gary Gershoff/WireImage)

NEW YORK, NY - SEPTEMBER 16: Gregg Sulkin and actress Bella Thorne attend 2015 Harper's BAZAAR ICONS Event at The Plaza Hotel on September 16, 2015 in New York City. (Photo by Gilbert Carrasquillo/Getty Images)

LOS ANGELES, CA - NOVEMBER 29: Bella Thorne (R) and Gregg Sulkin attend a basketball game between the Minnesota Timberwolves and the Los Angeles Lakers at Staples Center on November 29, 2015 in Los Angeles, California. (Photo by Noel Vasquez/GC Images)

LOS ANGELES, CA - NOVEMBER 29: Bella Thorne (R) and Gregg Sulkin attend a basketball game between the Minnesota Timberwolves and the Los Angeles Lakers at Staples Center on November 29, 2015 in Los Angeles, California. (Photo by Noel Vasquez/GC Images)

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This wasn't the only scantily clad photo that Thorne shared over the weekend. She also posted a topless photo of herself that revealed a huge tattoo of angel wings on her back. The ink is probably temporary as she did not have the tat in the bikini-clad pic she recently posted of herself on top of Posey.

Last week, Thorne explained to ET why it's important to express herself on social media. "I'm, like, an open book," she said. "But that's what I think that my fans enjoy about me the most, is that they feel like they really know me. And they do, they really f**king know me."

As for whether she's ever crossed the line with her posts, Thorne quipped, "I guess I haven't learned the line of 'too far' yet, because I always do pooping snaps. People always get after me about my pooping snaps. You know what I tell them? ...I don't give a f**k!"

The Famously in Love star is also helping Posey get acclimated to tweeting, snapping and Instagramming. "He doesn't [post] a lot on social media, so it's been... that's like the only thing that's been interesting is [that] I'm so about the socials and he isn't," she said of the 24-year-old Teen Wolf star. "It's a little bit of like, teaching and learning and pushing and pulling."